Creston Bridge Repair
CDI was engaged in 2008 by the SD DOT to provide a solution for emergency repairs to a railroad bridge over the Cheyenne River located about 30 miles west of Rapid City, South Dakota. The bridge was built in 1905 by the Chicago Milwaukee & St. Paul Railway. There are three main spans of 160 feet each on about a thirty degree skew. Pier number three had been undermined by changes in the river channel causing a complete bearing failure of the pier. Considering the urgency of the project, CDI recommended and engaged a design-build firm to install temporary shoring for the sagging spans and to construct a new pier capable of sustaining the dead load of the structure along with an E80 live load. Total cost of the repair was $755,000. All work was completed within five months of contract award and within seven months of engaging CDI.